ice_gnss.h (1609B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* Copyright (C) 2018-2021, Intel Corporation. */ 3 4#ifndef _ICE_GNSS_H_ 5#define _ICE_GNSS_H_ 6 7#include <linux/tty.h> 8#include <linux/tty_flip.h> 9 10#define ICE_E810T_GNSS_I2C_BUS 0x2 11#define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42 12/* Data length register is big endian */ 13#define ICE_GNSS_UBX_DATA_LEN_H 0xFD 14#define ICE_GNSS_UBX_DATA_LEN_WIDTH 2 15#define ICE_GNSS_UBX_EMPTY_DATA 0xFF 16#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ 17#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) 18#define ICE_MAX_UBX_READ_TRIES 255 19 20/** 21 * struct gnss_serial - data used to initialize GNSS TTY port 22 * @back: back pointer to PF 23 * @tty: pointer to the tty for this device 24 * @open_count: number of times this port has been opened 25 * @gnss_mutex: gnss_mutex used to protect GNSS serial operations 26 * @kworker: kwork thread for handling periodic work 27 * @read_work: read_work function for handling GNSS reads 28 */ 29struct gnss_serial { 30 struct ice_pf *back; 31 struct tty_struct *tty; 32 int open_count; 33 struct mutex gnss_mutex; /* protects GNSS serial structure */ 34 struct kthread_worker *kworker; 35 struct kthread_delayed_work read_work; 36}; 37 38#if IS_ENABLED(CONFIG_TTY) 39void ice_gnss_init(struct ice_pf *pf); 40void ice_gnss_exit(struct ice_pf *pf); 41bool ice_gnss_is_gps_present(struct ice_hw *hw); 42#else 43static inline void ice_gnss_init(struct ice_pf *pf) { } 44static inline void ice_gnss_exit(struct ice_pf *pf) { } 45static inline bool ice_gnss_is_gps_present(struct ice_hw *hw) 46{ 47 return false; 48} 49#endif /* IS_ENABLED(CONFIG_TTY) */ 50#endif /* _ICE_GNSS_H_ */